<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>js变量和类型</title>
		<script>
		  var w=3.15;
		  alert(w);
		  w="你好，我司渣渣豪";
		  alert(w);
		  var a=b=c=20;
		  alert(c);
		</script>
	</head>
	<body>
	</body>
</html>
